software

pyGreylist is a milter plugin written in Python that implements the greylist filtering method proposed by Evan Harris. It works by assuming that, spam engines will not retry sending their junk mail on a temporary error. The idea is to reject mail on a first attempt and then accept it after some time has elapsed. According to the SMTP specification, properly configured mail server should attempt to retry a delivery if it receives an temporary failure code.

DNS, Postfix, Sendmail, Milter, Greylist, Whitelist, Blacklist

15. 1. 2009

   - http://www.fit.vutbr.cz/~vasicek/nic-vip/greylist/ (http://www.fit.vutbr.cz/%7Evasicek/nic-vip/greylist/)

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https://www.fit.vut.cz/research/product/75/